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cfn-modules: Fargate ALB service to service example

This example project demonstrates how two services can communicate with each other using public and private ALBs. The following diagram illustrates the high-level architecture.

   ┌────────────┐   
   │            │   
   │            │   
   │    ALB     │   
   │   Public   │   
   │            │   
   └────────────┘   
          │         
          │         
┌─Service─▼────────┐
│ ┌──────────────┐ │
│ │              │ │
│ │              │ │
│ │  app         │ │
│ │  container   │ │
│ │              │ │
│ │              │ │
│ └──────────────┘ │
└──────────────────┘
          │         
          │ 
   ┌──────▼─────┐   
   │            │   
   │            │   
   │    ALB     │   
   │  Private   │   
   │            │   
   └────────────┘   
          │         
          │         
┌─Service─▼────────┐
│ ┌──────────────┐ │
│ │              │ │
│ │              │ │
│ │  app         │ │
│ │  container   │ │
│ │              │ │
│ │              │ │
│ └──────────────┘ │
└──────────────────┘

Prerequisites

  1. Install Node.js 10.x
  2. Create an S3 bucket where aws cloudformation package uploads the artifacts.
    1. Choose a unique bucket name, e.g. BucketName=cfn-modules-$Name-$Region
    2. Replace $Name with a unique name (e.g. your initials or company name)
    3. Replace $Region with your AWS default region (e.g. us-east-1)
    4. Create the bucket aws s3 mb s3://$BucketName

Usage

npm i
aws cloudformation package --template-file example.yml --s3-bucket $BucketName --output-template-file packaged.yml
aws cloudformation deploy --template-file packaged.yml --stack-name fargate-alb-service-to-service-example --capabilities CAPABILITY_IAM
aws cloudformation describe-stacks --stack-name fargate-alb-service-to-service-example --query "Stacks[0].Outputs[?OutputKey=='Url'].OutputValue" --output text

Open the URL in your web browser.

Don't forget to delete the stack once you are done with the demo:

aws cloudformation delete-stack --stack-name fargate-alb-service-to-service-example

Modules

Find all modules here: https://www.npmjs.com/org/cfn-modules